DTC Troubleshooting: P0670 (173)
  1. Measure voltage between glow plug control module 11P connector terminal No. 11 and body ground.
Is there battery voltage?
YES -
Replace the glow plug control module, then go to Step 24 .
NO -
Go to Step 30 .
  1. Turn the ignition switch OFF.
  1. Reconnect all connectors.
  1. Turn the ignition switch ON (II).
  1. Reset the ECM with the HDS.
  1. Do the GLOW ON/OFF in the INSPECTION MENU with the HDS.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0670 indicated?
YES -
Check for poor connections or loose terminals at the glow plug control module and the ECM, then go to Step 1 .
NO -
Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■
  1. Reconnect all connectors.
  1. Update the ECM if it does not have the latest software, or substitute a known-good ECM.
  1. Do the GLOW ON/OFF in the INSPECTION MENU with the HDS.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0670 indicated?
YES -
Check for poor connections or loose terminals at the glow plug control module and the ECM. If the ECM was updated, substitute a known-good ECM, then go to Step 32 . If the ECM was substituted, go to Step 1 .
NO -
If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■